Convoke

Reach

Lyn, Lady of the Plains enters the battlefield with a +1/+1 counter on her for each creature that convoked her.

If Lyn becomes tapped to convoke another creature, that creature enters the battlefield with a +1/+1 counter on it.

Remove a +1/+1 counter from Lyn: She deals damage equal to her power to target creature or planeswalker. Activate only once each turn.